摘要
风轮吊具是风电机组吊装风轮的重要装置,由于风轮吊具连接面受限于轮毂结构,通常风轮吊具连接螺栓安全系数在交变载荷的吊装工况下较难满足设计要求,需优化吊具结构和增大吊具连接螺栓安全系数。以某兆瓦级风电机组风轮吊具为例,通过三维软件对吊具进行参数化建模,利用有限元法对风轮吊具抬吊和对接工况进行数值分析。提出了基于梁体的吊具连接螺栓计算方法,通过研究吊具主板厚度、筋板位置、螺栓规格和螺栓拉伸力参数,计算风轮吊具和螺栓强度,并对吊具结构进行对比优化。结果显示:风轮吊具在对接工况下的吊具等效应力约为抬吊工况的1.2倍,而吊具变形则为抬吊工况的一半。各试验工况,风轮吊具的最大等效应力和最大变形均出现在吊具吊耳孔连接处。各试验条件,吊具连接螺栓等效应力波动较大。经优化,螺栓最大等效应力减少了20%。结果表明:对于相同吊装工况,风轮吊具的等效应力和变形波动较小。仅计算吊具等效应力和变形时,可忽略连接螺栓对吊具等效应力的影响。采用上筋板、增大主板厚度和螺栓规格、适当增大轮毂小端侧螺栓拉伸力的方式能一定程度上降低吊具螺栓等效应力。经现场实际验证,优化结果可行,对后续机组的吊具设计优化提供了借鉴和参考。
The wind turbine hoisting device is an important device for hoisting wind turbines in wind turbines.Due to the limited connection surface of the wind turbine hoisting device by the wheel hub structure,the safety factor of the connecting bolts of the wind turbine hoisting device is usually difficult to meet the design requirements under alternating load lifting conditions.Therefore,it is necessary to optimize the hoisting device structure and increase the safety factor of the connecting bolts of the hoisting device.Taking the wind wheel lifting device of a certain MW wind turbine as an example,a three-dimensional software was used to parameterize the modeling of the lifting device.The finite element method was used to numerically analyze the lifting and docking conditions of the wind wheel lifting device.A calculation method for connecting bolts of lifting equipment based on beam body was proposed.By studying the thickness of the main board of the lifting device,the position of the rib plate,the bolt specifications,and the bolt pretension parameters,the strength of the wind wheel lifting device and the bolt were calculated,and the lifting device structure was compared and optimized.The results show that the equivalent stress of the wind turbine lifting device in the docking condition is about 1.2 times that of the lifting condition,and the deformation of the lifting device is half of the lifting condition.Under various test conditions,the maximum equivalent stress and maximum deformation of the wind turbine lifting device occur at the connection of the lifting ear hole of the lifting device.Under various test conditions,the equivalent stress of the connecting bolts of the lifting device fluctuates greatly.After optimization,the maximum equivalent stress of the bolt has been reduced by 20%.The results indicate that for the same lifting conditions,the equivalent stress and deformation fluctuations of the wind turbine lifting device are relatively small.When only calculating the equivalent stress and deformation of t
作者
王岳峰
WANG Yuefeng(Technical Center,Taiyuan Heavy Industry Co.,Ltd.,Taiyuan 030024,China)
出处
《重型机械》
2024年第3期76-82,共7页
Heavy Machinery
基金
山西省科技重大专项计划“揭榜挂帅”项目(202201060301015)。
关键词
风电机组
风轮
有限元分析
强度分析
wind turbines
wind wheel
finite element analysis
strength analysis
